tabId Optional

integer. The ID of the tab to change the zoom settings for. Defaults to the active tab of the current window.

zoomSettings

tabs.ZoomSettings. Defines how zoom changes are handled and at what scope.

A Promise that will be fulfilled with no arguments after the zoom settings have been changed. If the tab could not be found or some other error occurs, the promise will be rejected with an error message.getZoom

Disable zooming for the current tab:

function onSet() {
  console.log(`Set zoom factor`);
}

function onError(error) {
  console.log(`Error: ${error}`);
}

let setting = browser.tabs.setZoomSettings({mode:"disabled"});
setting.then(onSet, onError);